#include "tests/HashMapTests.h"

#include "data/HashMap.h"
#include "test/Test.h"

using IntMap = Core::HashMap<int, int>;
using String = Core::ArrayString<128>;

template<typename T>
static String build(const T& t) {
    String s;
    CORE_TEST_FALSE(s.append(t));
    return s;
}

static void testAdd() {
    IntMap map;
    CORE_TEST_NOT_NULL(map.add(5, 4));
    int* value = map.search(5);
    CORE_TEST_NOT_NULL(value);
    if(value != nullptr) {
        CORE_TEST_EQUAL(4, *value);
    }
}

static void testMultipleAdd() {
    IntMap map;
    CORE_TEST_NOT_NULL(map.add(5, 4));
    CORE_TEST_NOT_NULL(map.add(10, 3));
    CORE_TEST_NOT_NULL(map.add(15, 2));
    CORE_TEST_TRUE(map.contains(5));
    CORE_TEST_TRUE(map.contains(10));
    CORE_TEST_TRUE(map.contains(15));
    int* a = map.search(5);
    int* b = map.search(10);
    int* c = map.search(15);
    CORE_TEST_NOT_NULL(a);
    CORE_TEST_NOT_NULL(b);
    CORE_TEST_NOT_NULL(c);
    if(a != nullptr && b != nullptr && c != nullptr) {
        CORE_TEST_EQUAL(4, *a);
        CORE_TEST_EQUAL(3, *b);
        CORE_TEST_EQUAL(2, *c);
    }
}

static void testSearch() {
    IntMap map;
    CORE_TEST_NULL(map.search(6));
}

static void testAddReplace() {
    IntMap map;
    CORE_TEST_NOT_NULL(map.add(5, 4));
    CORE_TEST_NOT_NULL(map.add(5, 10));
    CORE_TEST_TRUE(map.contains(5));
    int* a = map.search(5);
    CORE_TEST_NOT_NULL(a);
    if(a != nullptr) {
        CORE_TEST_EQUAL(10, *a);
    }
}

static void testClear() {
    IntMap map;
    CORE_TEST_NOT_NULL(map.add(5, 4));
    CORE_TEST_NOT_NULL(map.add(4, 10));
    map.clear();
    CORE_TEST_FALSE(map.contains(5));
    CORE_TEST_FALSE(map.contains(4));
}

static void testOverflow() {
    IntMap map;
    for(int i = 0; i < 100000; i++) {
        CORE_TEST_NOT_NULL(map.add(i, i));
    }
    for(int i = 0; i < 100000; i++) {
        CORE_TEST_TRUE(map.contains(i));
    }
}

struct A {
    int a;
    int b;

    A(int a_, int b_) : a(a_), b(b_) {
    }

    // none of these should be needed for the hashmap
    A(const A&) = delete;
    A(A&&) = delete;
    A& operator=(const A&) = delete;
    A& operator=(A&&) = delete;

    bool operator==(const A& other) const {
        return a == other.a && b == other.b;
    }

    template<int N>
    check_return bool toString(Core::ArrayString<N>& s) const {
        return s.append("A(") || s.append(a) || s.append(", ") || s.append(b) ||
               s.append(")");
    }
};

static void testEmplace() {
    Core::HashMap<int, A> map;

    CORE_TEST_NOT_NULL(map.tryEmplace(0, 3, 4));
    CORE_TEST_NOT_NULL(map.tryEmplace(3, 4, 5));
    CORE_TEST_NOT_NULL(map.tryEmplace(20, 5, 6));
    CORE_TEST_NULL(map.tryEmplace(3, 6, 7));
    CORE_TEST_NULL(map.tryEmplace(20, 7, 8));

    A* a = map.search(0);
    A* b = map.search(3);
    A* c = map.search(20);

    CORE_TEST_NOT_NULL(a);
    CORE_TEST_NOT_NULL(b);
    CORE_TEST_NOT_NULL(c);

    if(a != nullptr && b != nullptr && c != nullptr) {
        CORE_TEST_EQUAL(A(3, 4), *a);
        CORE_TEST_EQUAL(A(4, 5), *b);
        CORE_TEST_EQUAL(A(5, 6), *c);
    }
}

static void testToString1() {
    IntMap map;
    CORE_TEST_NOT_NULL(map.add(1, 3));
    CORE_TEST_NOT_NULL(map.add(2, 4));
    CORE_TEST_NOT_NULL(map.add(3, 5));
    CORE_TEST_EQUAL(build("[1 = 3, 2 = 4, 3 = 5]"), build(map));
}

static void testToString2() {
    IntMap map;
    CORE_TEST_NOT_NULL(map.add(1, 3));
    CORE_TEST_EQUAL(build("[1 = 3]"), build(map));
}

static void testToString3() {
    IntMap map;
    CORE_TEST_EQUAL(build("[]"), build(map));
}

static void testCopy() {
    IntMap map;
    CORE_TEST_NOT_NULL(map.add(1, 3));
    CORE_TEST_NOT_NULL(map.add(2, 4));
    CORE_TEST_NOT_NULL(map.add(3, 5));
    IntMap copy;
    CORE_TEST_FALSE(copy.copyFrom(map));

    int* a[6] = {map.search(1),  map.search(2),  map.search(3),
                 copy.search(1), copy.search(2), copy.search(3)};
    for(int i = 0; i < 3; i++) {
        CORE_TEST_NOT_NULL(a[i]);
        CORE_TEST_NOT_NULL(a[i + 3]);
        if(a[i] != nullptr && a[i + 3] != nullptr) {
            CORE_TEST_EQUAL(*(a[i]), *(a[i + 3]));
        }
    }
}

static void testMove() {
    IntMap map;
    CORE_TEST_NOT_NULL(map.add(1, 3));
    CORE_TEST_NOT_NULL(map.add(2, 4));
    CORE_TEST_NOT_NULL(map.add(3, 5));
    IntMap move(Core::move(map));

    int* a = move.search(1);
    int* b = move.search(2);
    int* c = move.search(3);

    CORE_TEST_NOT_NULL(a);
    CORE_TEST_NOT_NULL(b);
    CORE_TEST_NOT_NULL(c);

    if(a != nullptr && b != nullptr && c != nullptr) {
        CORE_TEST_EQUAL(3, *a);
        CORE_TEST_EQUAL(4, *b);
        CORE_TEST_EQUAL(5, *c);
    }
}

static void testMoveAssignment() {
    IntMap map;
    CORE_TEST_NOT_NULL(map.add(1, 3));
    CORE_TEST_NOT_NULL(map.add(2, 4));
    CORE_TEST_NOT_NULL(map.add(3, 5));

    IntMap move;
    move = Core::move(map);

    int* a = move.search(1);
    int* b = move.search(2);
    int* c = move.search(3);

    CORE_TEST_NOT_NULL(a);
    CORE_TEST_NOT_NULL(b);
    CORE_TEST_NOT_NULL(c);

    if(a != nullptr && b != nullptr && c != nullptr) {
        CORE_TEST_EQUAL(3, *a);
        CORE_TEST_EQUAL(4, *b);
        CORE_TEST_EQUAL(5, *c);
    }
}

static void testRemove() {
    IntMap map;
    CORE_TEST_NOT_NULL(map.add(1, 3));
    CORE_TEST_NOT_NULL(map.add(2, 4));
    CORE_TEST_NOT_NULL(map.add(3, 5));

    bool remove1 = map.remove(2);
    bool remove2 = map.remove(7);

    int* a = map.search(1);
    int* b = map.search(2);
    int* c = map.search(3);

    CORE_TEST_NOT_NULL(a);
    CORE_TEST_NULL(b);
    CORE_TEST_NOT_NULL(c);

    CORE_TEST_TRUE(remove1);
    CORE_TEST_FALSE(remove2);

    if(a != nullptr && c != nullptr) {
        CORE_TEST_EQUAL(3, *a);
        CORE_TEST_EQUAL(5, *c);
    }
}

static void testEntryForEach() {
    IntMap map;
    CORE_TEST_NOT_NULL(map.add(5, 4));
    CORE_TEST_NOT_NULL(map.add(10, 3));
    CORE_TEST_NOT_NULL(map.add(15, 2));

    int counter = 0;
    for(auto& entry : map.entries()) {
        counter += entry.getKey() + entry.value;
    }
    CORE_TEST_EQUAL(39, counter);

    const IntMap& cmap = map;
    counter = 0;
    for(const auto& entry : cmap.entries()) {
        counter += entry.getKey() + entry.value;
    }
    CORE_TEST_EQUAL(39, counter);
}

static void testKeyForEach() {
    IntMap map;
    CORE_TEST_NOT_NULL(map.add(5, 4));
    CORE_TEST_NOT_NULL(map.add(10, 3));
    CORE_TEST_NOT_NULL(map.add(15, 2));

    int counter = 0;
    for(const int& key : map.keys()) {
        counter += key;
    }
    CORE_TEST_EQUAL(30, counter);

    const IntMap& cmap = map;
    counter = 0;
    for(const int& key : cmap.keys()) {
        counter += key;
    }
    CORE_TEST_EQUAL(30, counter);
}

static void testValueForEach() {
    IntMap map;
    CORE_TEST_NOT_NULL(map.add(5, 4));
    CORE_TEST_NOT_NULL(map.add(10, 3));
    CORE_TEST_NOT_NULL(map.add(15, 2));

    int counter = 0;
    for(int& value : map.values()) {
        counter += value;
    }
    CORE_TEST_EQUAL(9, counter);

    const IntMap& cmap = map;
    counter = 0;
    for(const int& value : cmap.values()) {
        counter += value;
    }
    CORE_TEST_EQUAL(9, counter);
}

template<typename T>
static void testType() {
    Core::HashMap<T, int> m;
    CORE_TEST_NOT_NULL(m.add(T(), 3));
}

static void testTypes() {
    testType<char>();
    testType<signed char>();
    testType<signed short>();
    testType<signed int>();
    testType<signed long>();
    testType<signed long long>();
    testType<unsigned char>();
    testType<unsigned short>();
    testType<unsigned int>();
    testType<unsigned long>();
    testType<unsigned long long>();
}

void Core::HashMapTests::test() {
    testAdd();
    testMultipleAdd();
    testSearch();
    testAddReplace();
    testClear();
    testOverflow();
    testEmplace();
    testToString1();
    testToString2();
    testToString3();
    testCopy();
    testMove();
    testMoveAssignment();
    testRemove();
    testEntryForEach();
    testKeyForEach();
    testValueForEach();
    testTypes();
}